The nation's largest marijuana policy advocacy group plans to begin raising funds for a ballot measure in 2016 to legalize recreational marijuana use in California.

The Marijuana Policy Project says it will file paperwork Wednesday with the California secretary of state's office for a new committee that aims to put a pot legalization measure on the November 2016 state ballot. The measure would be similar to one passed by voters in Colorado in 2012, which legalized marijuana for all adults over 21.

California currently allows marijuana use only for medical purposes.

Voters rejected a ballot initiative seeking to legalize it for recreational purposes in 2010, and some of the state's top politicians, including Gov. Jerry Brown and Sen. Dianne Feinstein, have expressed skepticism about legalization.